膜科学与技术

PES/ZnO@rGO共混超滤膜的制备及其性能

作者：朱吉凯，丁长坤，秦茜雯，薛蔓，田盈盈

单位：天津工业大学省部共建分离膜与膜过程国家重点实验室，材料科学与工程学院，天津 300387

关键词：氧化锌；还原氧化石墨烯；聚醚砜；共混膜；光催化；抗污染

出版年,卷(期):页码： 2022,42(2):47-55

摘要：

采用溶剂热法合成了ZnO为颗粒状形貌的ZnO@rGO复合材料。以N，N-二甲基乙酰胺(DMAc)及N-甲基吡咯烷酮(NMP)为溶剂，聚乙二醇(PEG4000)为致孔剂，采用非溶剂致相分离法(NIPS)制备了聚醚砜（PES）/ZnO@rGO共混超滤膜，研究了ZnO@rGO复合材料的含量对PES共混膜结构与性能的影响。结果表明：PES/ZnO@rGO共混膜的水接触角从纯PES膜的83.7°下降到66.2°，纯水通量达到198.12 L/(m2·h)，是纯PES膜纯水通量的4倍，对牛血清蛋白（BSA）的截留率保持在96%以上，通量恢复率从69%增加到88%，抗污染性能较纯PES膜明显提高。共混膜对甲基蓝（MB）的光催化降解效率从68%提高到93%，显示出优异的光催化降解能力。

In this work, ZnO@rGO composites were synthesized by solvothermal method, in which ZnO was granular morphology. Using N,N-dimethylacetamide (DMAc) and 1-methy1-2-pyrrolidinone (NMP) as solvents, polyethylene glycol (PEG4000) as pore-forming agent, the polythersulfone (PES)/ZnO@rGO blend membranes were prepared by non-solvent phase separation (NIPS) method. The effect of the addition contents of ZnO@rGO on the structure and performance of PES blend membranes was investigated. The results showed that the water contact angles could change from 83.7° of the PES/ZnO@rGO blend membranes to 66.2° of the pure PES membrane to, and the pure water flux of the blend membranes could achieve 198.12 L/(m2·h), which is 4 times larger than that of the pure PES membrane. In addition, the BSA rejection of PES/ZnO@rGO blend membranes is above 96% and the flux recovery rate increased from 69% to 88%, and the anti-fouling performance of the blend membranes could be improved significantly. Furthermore, the photocatalytic activity of PES/ZnO@rGO blend membranes for MB increased from 68% to 93%, showing excellent photocatalytic ability.

朱吉凯（1995-），男，河南濮阳市人，硕士生，研究方向为氧化锌/还原氧化石墨烯制备及其聚醚砜膜性能研究

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